SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

i-act.com.tw

SSL/TLS Certificate

Whois RDAP DNS Records Certificate Uptime Diagnostics History Hide Contact Info

SSL/TLS Certificate for i-act.com.tw

Valid

Issued by (CA): Let's Encrypt
Subject: cpcontacts.i-act.life
Valid from: Aug 5, 2026
Valid until: Nov 3, 2026 (57 days remaining)
Public key: RSA 2048-bit
Serial: 067F1F6B72621FA11B08C6BD3253DA9F700F
SHA-256 fingerprint: A3:A8:73:E3:7D:E4:BF:3B:8D:A7:BA:DC:B9:41:98:BC:98:C3:3B:40:25:36:8D:24:01:E1:3B:26:E2:B8:CE:08
Chain: YR2 → Root YR → ISRG Root X1

Subject Alternative Names (24)

autoconfig.i-act.com.tw, autoconfig.i-act.life, autodiscover.i-act.com.tw, autodiscover.i-act.life, cpanel.i-act.com.tw, cpanel.i-act.life, cpcalendars.i-act.com.tw, cpcalendars.i-act.life, cpcontacts.i-act.com.tw, cpcontacts.i-act.life, i-act-com-tw.designband.org, i-act-life.designband.org, i-act.com.tw, i-act.life, mail.i-act.com.tw, mail.i-act.life, webdisk.i-act.com.tw, webdisk.i-act.life, webmail.i-act.com.tw, webmail.i-act.life, www.i-act-com-tw.designband.org, www.i-act-life.designband.org, www.i-act.com.tw, www.i-act.life

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by i-act.com.tw's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch i-act.com.tw continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.